<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>EventTarget</title>

    <script src="js/jquery-3.1.1.min.js"></script>
    <script src="js/EventTarget.js"></script>

</head>
<body>
<div style='width:  300px; height: 300px; background-color: #adf3ff'>
    <ul>
        <li>A</li>
        <li>B</li>
        <li>C</li>
    </ul>

    <button id="clickMeButton">
         按钮
    </button>

</div>
</body>
</html>